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Introduction to Surfacing © 2022, ASCENT - Center for Technical Knowledge® 1–9 1.4 Creating a Surface Model The process of creating surface features differs slightly from that for creating solid features in CATIA. With solid modeling, you can often visualize the final shape of a feature and create the geometry with individual construction features (e.g., Pad, Pocket, fillet, hole, etc.). With surfaces, you must frequently create reference geometry (e.g., points and curves) before creating a single surface feature. Planning ahead is essential to achieving the required results when designing with surfaces. When you create solid features, all of the faces of the feature are defined in one step. The intersections of solid features are immediately calculated and consumed in the model. With surfaces, the contours of the model can be created individually as separate features. These multiple surfaces can then be joined to generate a final solid feature. As a result, simple surfaces have the benefit of being able to yield complex results. A model does not necessarily have to be constructed entirely of surface geometry. Solid features can be used in combination with surface geometry to generate the shape of the model. Operations are performed on the solid geometry to intersect the surface geometry and add or remove material. General Steps Use the following general steps to create a model from surface features: 1. Create wireframe geometry. 2. Create surface geometry. 3. Perform surface operations. 4. (Optional) Create solid geometry. Wireframe geometry is the backbone on which surface features are created. You can use wireframe features to define construction elements, intersections, and common boundaries of the surfaces that define the shape of the model. Wireframe geometry can consist of simple features, such as sketches, points, lines, and planes, as well as more complex geometry, such as splines or circles. Step 1 - Create wireframe geometry. Sample provided by ASCENT for review only All copying and reuse strictly forbidden.